Low pressure steam generator, flame inversion type, with wet bottom, efficiency from 91% (STD) to 95% (HP) depending on the type of pipe used.

The BAHR’UNO CB series is a family of steam generators designed for a maximum safety pressure up to 0.98 bar. The range includes various models with steam production from 100 to 1000 kg/h.

In accordance with current legislation, the BAHR’UNO CB family of low-pressure steam generators has been subjected to a conformity assessment by a Notified Body. Compliance with the Essential Safety Requirements of the European Directive 2014/68 / EU of the pressure body is evidenced by the CE P.E.D marking.


General characteristics:
Designed in compliance with the EN12953-3: 2016 standard
the flame inversion generator consists of a cylindrical
furnace, with a wet bottom, in which the flame develops and where the inversion of the combustion gases takes place. The fumes then enter the tube bundle at the front tube plate and are conveyed towards the rear tube plate from which they exit through the smoke chamber.
The boiler is sized to ensure low thermal loads.

  • Boiler body: it consists of cylindrical outer shell, furnace, furnace bottom and flat tube plates in quality steel, in compliance with current technical standards. The materials used are accompanied by manufacturing certificates certifying the chemical and mechanical characteristics and the controls during the production cycle and therefore their suitability for use. Welding is carried out according to procedures approved by suitably qualified personnel and subjected, in accordance with an internal “Manufacturing and Control” plan to non-destructive tests. Once manufacturing is complete, each pressurized body is subjected to testing by carrying out the hydraulic test in accordance with requirement 7.4 - Annex 1 of Directive 2014/68 / EU.
  • The smoke pipes: making up the quality steel tube bundle, are welded to the tube plates using qualified automatic procedures. Finally, the pipes are headed by counterbore eliminating the protrusions from the plate. The smoke pipes are equipped with turbulators or inserts according to the type of pipe used.
  • Front door: is built in welded steel sheet, internally lined with a layer of insulating material and a layer of high-thickness refractory material. It is mounted on hinges that allow it to be opened quickly and is equipped with a self-cleaning flame sight glass suitably positioned to check the correctness of the combustion in operation. The burner attachment plate is bolted onto it and can be drilled for the type of burner indicated by the customer.
  • Rear smoke chamber: made of welded steel sheet, it is fixed to the rear tube plate by means of bolts to allow its removal. Insulated on the bottom, it is equipped with a suitable cleaning inspection door, and a horizontal axis flue pipe with a diameter suitable for the power of the generator.
  • Base: it consists of a frame in boxed steel profiles, welded to the tube plates.
  • Upper cover: located in the upper part of the generator, it is made up of a frame in steel sections, covered with sheet metal (not walkable).
  • Insulation of the outer shell and the front upper part: the thermal insulation is obtained with a 50 mm thick rock wool mattress, bonded with high-density thermosetting resins, supported and covered externally by the 10/10 thick painted steel sheet casing. The front upper part of the boiler is protected externally by a metal box.

Composition of the standard supply: (1)

  • n. 1 steam outlet shut-off flow valve.
  • n. 1 weight-lever safety valve
  • n. 1 reflective level indicator, with threaded connections and shut-off and drain valves + n. 2 test taps (up to mod. 400)
  • no. 2 reflection level indicators, threaded connections, interception and drain valves (starting from mod. 500)
  • Electric panel for automatic operation,
    IP55 400V-3+N-50Hz complete with:
    - n. 1 large dial pressure gauge with 3-way tap for calibration
    - n. 1 safety pressure switch with manual reset, CE PED approved
    - n. 1 limit pressure switch
    - n. 1 pressure transducer for regulation of two-stage burner (high / low flame) or pressure probe for modulating burners
    - n. 2 low water level safety probes, with self-diagnosis, with manual reset on the control panel, CE certified
    - n. 2 water level probes for pump/s ON-OFF
  • n. 1 centrifugal electric pump for water loading
    Water loading line circuit with pipes and shut-off valve
  • n. 1 group of water drain / sludge discharge with quick opening manual valve
  • Upper inspection port with flange of large diameter.
  • Moisture separator on the main steam outlet, for high-titer steam without dripping
  • Turbulators (for BAHR’UNO CB OR version) or high efficiency inserts (for BAHR’UNO CB HPO, HP versions)
  • Standard documentation supplied

- “Second boiler water feed pump” kit
- “Feed water inlet filter” kit
- “Maximum level safety” kit
- “TDS” kit (from mod. 300)
- “Automatic bottom drain” kit
- “24 hr” or “72 hr” (*) kit for standard generator
- Burner plate drilled according to burner requirements
- Burner

Special versions

  • BAHR’UNO CB 24 hr
    equipped with dedicated panel board and “24 hr KIT” to obtain the certification to operate “without continuous supervision” up to a maximum of 24 hours

  • BAHR’UNO CB 72 hr
    equipped with dedicated panel board and “72 hr KIT” to obtain certification to operate “without continuous supervision” up to a maximum of 72 hours (from mod. 300)

(1) Quantities, types or models may vary according to the configuration offered.

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